Technical Specifications

Table 15. Continuous Operation Specifications for ASHRAE A4 (continued)
Temperature Specifications
Operational altitude de-rating Maximum temperature is reduced by 1°C/125 m (33.8°F/410 Ft) above
900 m (2953 Ft)
Table 16. Common Environmental Specifications for ASHRAE A2, A3, and A4
Temperature Specifications
Allowable continuous operations
Maximum temperature gradient (applies to both
operation and non-operation)
20°C in an hour* (36°F in an hour) and 5°C in 15 minutes (41°F in 15
minutes), 5°C in an hour* (41°F in an hour) for tape
NOTE: * - Per ASHRAE thermal guidelines for tape hardware, these are
not instantaneous rates of temperature change.
Non-operational temperature limits -40 to 65°C (-104 to 149°F)
Non-operational humidity limits 5% to 95% RH with 27°C (80.6°F) maximum dew point
Maximum non-operational altitude 12,000 meters (39,370 feet)
Maximum operational altitude 3,048 meters (10,000 feet)
Table 17. Maximum vibration specifications
Maximum vibration Specifications
Operating 0.21 G
rms
at 5 Hz to 500 Hz for 10 min (all x, y, and z axes)
Storage 1.88 G
rms
at 10 Hz to 500 Hz for 15 minutes (all six sides tested)
Table 18. Maximum shock pulse specifications
Maximum shock pulse Specifications
Operating Six consecutively executed shock pulses in the positive and negative x, y,
and z axis of 6 G for up to 11 ms.
Storage Six consecutively executed shock pulses in the positive and negative x, y,
and z axis (one pulse on each side of the system) of 71 G for up to 2 ms.
Particulate and gaseous contamination specifications
The following table defines the limitations that help avoid any damages to the IT equipment and/or, or both failure from
particulate and gaseous contamination. If the levels of particulate or gaseous pollution exceed the specified limitations and
results in equipment damage or failure, you must rectify the environmental conditions. Remediation of environmental conditions
is the responsibility of the customer.
Table 19. Particulate contamination specifications
Particulate contamination Specifications
Air filtration Data center air filtration as defined by ISO Class 8 per ISO
14644-1 with a 95% upper confidence limit.
NOTE: This condition applies to data center environments
only. Air filtration requirements do not apply to IT
equipment designed to be used outside a data center, in
environments such as an office or factory floor.
NOTE: Air entering the data center must have MERV11 or
MERV13 filtration.
Conductive dust Air must be free of conductive dust, zinc whiskers, or other
conductive particles.
10 Technical specifications